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Finding the Fourth Proportional to 15,898.32, 21,939.84 and 8,825.40

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Solution

The fourth proportional to 15,898.32, 21,939.84 and 8,825.40 is: 12,179.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,898.32 : 21,939.84 = 8,825.40 : x
  2. Step 2: Convert to fraction form
    15,898.32/21,939.84 = 8,825.40/x
  3. Step 3: Cross multiply
    15,898.32x = 21,939.84 × 8,825.40
  4. Step 4: Simplify right side
    15,898.32x = 193,627,863.94
  5. Step 5: Solve for x
    x = 193,627,863.94/15,898.32
  6. Step 6: Final answer
    x = 12,179.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.